Addendum A: Regional tsunami hazard assessment for Pasagshak, Alaska
Description
Report of Investigation 2019-6A, Addendum A: Regional tsunami hazard assessment for Pasagshak, Alaska, provides an estimated extent of the tsunami hazard zone in the community of Pasagshak, Alaska. Pasagshak is a small community on Kodiak Island, about 70 km (44 mi) south of Kodiak. The highest resolution bathymetric grid that covers this community is the level 3 grid with a grid size of about 45x82 m. We estimate the extent of the tsunami hazard zone in Pasagshak by running all nine tsunami scenarios described in the main report (Report of Investigation 2019-6). Each model run was performed for 12 hours of tsunami propagation to account for all waves in the wave train, including any secondary (reflected) waves. The maximum value of the tsunami height based on a composite of all scenarios, multiplied by a safety factor of 1.3, results in a maximum estimated runup height of 39 m (128 ft) for the community of Pasagshak. We illustrate the maximum estimated tsunami runup on land by drawing an elevation contour on the 5-m (16-ft) resolution community topographic map that corresponds to the maximum modeled wave height offshore. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30763.
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https://doi.org/10.14509/30763 |
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https://doi.org/10.14509/29740 |
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https://doi.org/10.14509/30760 |
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CSDGM IMPORT ERROR: No digtinfo/formcont |
https://doi.org/10.14509/30763 |
Tags
- zenter stream
- topography
- engineering
- seismic hazards
- land subsidence
- inundation
- marine geology
- modeling
- faults
- earthquake related slope failure
- pasagshak
- geologic
- environmental
- engineering geology
- dggs
- coastal
- gulf of alaska
- lupin lake
- subsidence
- marine
- lake rose teed
- faulting
- earthquake
- flood
- fault displacement
- kodiak island
- geotechnical
- neotectonics
- bull lake
- geological process
- active fault
- landslide
- hazards
- emergency preparedness
- surface
- pacific ocean
- pasagshak point
- tsunami
- geologic hazards